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Question

Which of the substances A, B and C has the lowest heat capacity, if heat is supplied to all of them at equal rates? The temperature versus time graph is shown:


A

A

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B

B

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C

C

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D

Equal for all

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Solution

The correct option is A

A


Substance having more heat capacity takes longer time to get heated to a higher temperature and longer time to get cooled. If we draw a line parallel to the time axis, then it cuts the given graphs at three different points corresponding points on the time axis show that tC>tB>tC or CC>CB>CA


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